`1)` was preparing

`-` Yesterday at `5` P.M `to` QKTD

`( + )` S + Was/were + V-ing

`-` S là I `to` was

`2)` were not cycling

`-` QKTD: `( - )` S + was/were not + V-ing

`-` S là we `to` were ( not)

`3)` was working `-` was swimming

`-` QKTD: diễn tả hành động xảy ra song song và không liên quan tới nhau

`4)` Did you do

`-` Có yesterday `to` QKĐ

`( ? )` Wh + did + S + do + O

`5)` were sitting

`-` S là they ( số nhiều) `to` were

`6)` was studying

`-` Có Yesterday at `5` o'clock `to` QKTD

`-` S là I `to` was

`7)` was talking

`8)` was waiting

`9)` were playing

`10)` didn't listen

`@` Notes:

`-` Từ câu `7` `to` câu 10` khi thấy có when hoặc while

`to` Hành động đang xảy ra `to` QKTD

`to` Hành động xen vào `to` QKĐ

`to` Hành động xảy ra song song nhưng không liên quan đến nhau `to` QKTD

`@` Cấu trúc QKĐ

`( - )` S + did not + V + O

`#Ph`

`1)` was preparing

`2)` weren't cycling

`3)` was working `-` was swimming

`4)` were you doing/did you do

`->` Wh- + did + S + V-inf ... ?

`5)` were sitting

`6)` was studying

`7)` was talking

`8)` was waiting

`9)` were playing

`10)` wasn't listening

`-`

`@` S + was/were (not) + V-ing ...

`@` cách dùng QKTD:

`*` diễn tả HĐ đang diễn ra tại `1` thời điểm cụ thể trong quá khứ

`*` diễn tả HĐ tiếp tục kéo dài trong quá khứ

`*` diễn tả hai hành động xảy ra đồng thời trong quá khứ

@magnetic